var express = require('express');
var fs = require('fs');
var io = require('socket.io');
var crypto = require('crypto');

var app = express.createServer();
var staticDir = express.static;

io = io.listen(app);

var opts = {
    port: 1948,
    baseDir: __dirname + '/../../'
};

io.sockets.on('connection', function (socket) {
    socket.on('slidechanged', function (slideData) {
        if (typeof slideData.secret == 'undefined' || slideData.secret == null || slideData.secret === '') return;
        if (createHash(slideData.secret) === slideData.socketId) {
            slideData.secret = null;
            socket.broadcast.emit(slideData.socketId, slideData);
        }
        ;
    });
});

app.configure(function () {
    ['css', 'js', 'plugin', 'lib'].forEach(function (dir) {
        app.use('/' + dir, staticDir(opts.baseDir + dir));
    });
});

app.get("/", function (req, res) {
    res.writeHead(200, {'Content-Type': 'text/html'});
    fs.createReadStream(opts.baseDir + '/index.html').pipe(res);
});

app.get("/token", function (req, res) {
    var ts = new Date().getTime();
    var rand = Math.floor(Math.random() * 9999999);
    var secret = ts.toString() + rand.toString();
    res.send({secret: secret, socketId: createHash(secret)});
});

var createHash = function (secret) {
    var cipher = crypto.createCipher('blowfish', secret);
    return (cipher.final('hex'));
};

// Actually listen
app.listen(opts.port || null);

var brown = '\033[33m',
    green = '\033[32m',
    reset = '\033[0m';

console.log(brown + "reveal.js:" + reset + " Multiplex running on port " + green + opts.port + reset);